WO2017213187A1 - Dispositif enrouleur de ceinture de sécurité - Google Patents

Dispositif enrouleur de ceinture de sécurité Download PDF

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Publication number
WO2017213187A1
WO2017213187A1 PCT/JP2017/021183 JP2017021183W WO2017213187A1 WO 2017213187 A1 WO2017213187 A1 WO 2017213187A1 JP 2017021183 W JP2017021183 W JP 2017021183W WO 2017213187 A1 WO2017213187 A1 WO 2017213187A1
Authority
WO
WIPO (PCT)
Prior art keywords
moving member
vehicle
cylinder
axial direction
webbing
Prior art date
Application number
PCT/JP2017/021183
Other languages
English (en)
Japanese (ja)
Inventor
弥 梁川
真一 大久保
Original Assignee
株式会社東海理化電機製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社東海理化電機製作所 filed Critical 株式会社東海理化電機製作所
Priority to JP2018521761A priority Critical patent/JP6827043B2/ja
Priority to US16/305,615 priority patent/US10919488B2/en
Priority to CN201780034316.4A priority patent/CN109311448B/zh
Priority to DE112017002911.2T priority patent/DE112017002911T5/de
Publication of WO2017213187A1 publication Critical patent/WO2017213187A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
    • B60R22/4633—Linear actuators, e.g. comprising a piston moving along reel axis and rotating along its own axis
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503—Safety buckles
    • A44B11/2546—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R22/4676—Reels with means to tension the belt in an emergency by forced winding up comprising energy-absorbing means operating between belt reel and retractor frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
    • B60R2022/4642—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators the gas directly propelling a flexible driving means, e.g. a plurality of successive masses, in a tubular chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R2022/4685—Reels with means to tension the belt in an emergency by forced winding up with means to adjust or regulate the tensioning force in relation to external parameters

Definitions

  • This disclosure relates to a webbing take-up device in which a spool is rotated in the take-up direction when a moving member is moved to the tip end side in the axial direction.
  • the present disclosure is intended to obtain a webbing take-up device that can effectively limit the movement of the moving member toward the proximal side in the axial direction due to the rotation of the spool in the drawing direction in consideration of the above fact.
  • the webbing take-up device is such that the webbing of the seat belt device is taken up by being rotated in the take-up direction, and the webbing is pulled to pull in the pull-out direction opposite to the take-up direction.
  • a spool to which a rotational force is applied a rotating member that is rotated in the winding direction by rotation to one side, and that is rotated to the other side by rotation in the pull-out direction of the spool;
  • the moving member is engaged with the rotating member by being moved to the front end side of the direction to rotate the rotating member to one side, and is capable of being deformed in a direction intersecting the axial direction, A restricting portion that engages with the deformed portion and restricts the movement of the moving member toward the proximal side in the axial direction.
  • the moving member moved to the distal end side in the axial direction is pressed by the engaging portion of the rotating member to return to the proximal side in the axial direction
  • the moving member is By engaging with the limiting portion, the movement of the moving member toward the proximal side in the axial direction is limited.
  • the webbing take-up device further includes a cylindrical part, and the cylindrical part has the moving member disposed on the inside thereof, and one end is opened at a side of the rotating member, and the moving member Is moved to the tip end side in the axial direction by the pressure of the fluid supplied to the other end side, moved from one end of the cylindrical member to the outside, and engaged with the rotating member.
  • the rotating member has an engaging portion that engages with the moving member, and the engaging portion is in contact with the moving member by rotation of the rotating portion accompanying the movement of the moving member toward the distal end side in the axial direction.
  • the engagement range is increased or decreased.
  • the restriction portion is provided between a rotation position of the engagement portion where the engagement range between the engagement portion of the rotation member and the moving member is maximized and one end of the cylindrical member.
  • the moving member moved to the distal end side in the axial direction is pressed by the engaging portion of the rotating member to return to the proximal side in the axial direction
  • the moving member is By engaging with the limiting portion, the movement of the moving member toward the proximal side in the axial direction is limited.
  • the restricting portion is between the rotation position of the engaging portion where the engaging range of the engaging portion of the rotating member and the moving member is maximum and one end of the cylindrical member. Is provided. As a result, the deformed portion of the moving member that has been pressed by the rotating member to return to the axial base end side can be effectively engaged with the limiting portion.
  • a webbing take-up device is the webbing take-up device according to the first aspect or the second aspect, further comprising a guide portion, the guide portion guiding the moving member moved in a vehicle emergency.
  • the guide portion is provided with a deformation allowing portion for allowing deformation of the moving member on the distal end side in the axial direction of the moving member with respect to the restricting portion.
  • the moving member is guided and moved by the guide unit in the event of a vehicle emergency.
  • a deformable portion is provided on the distal end side of the moving member in the axial direction of the restricting portion in the guide portion, and the moving member is deformed in a direction intersecting the axial direction by receiving a load from the rotating member. Can be deformed by the deformable portion of the guide.
  • the deformed portion of the deformed moving member is engaged with the restricting portion, the movement of the moving member toward the proximal side in the axial direction can be restricted.
  • the webbing take-up device according to the fourth aspect of the present disclosure is the webbing take-up device according to the third aspect, in which the restricting portion is provided in the guide portion.
  • the restricting portion is provided in the guide portion where the moving member is guided. For this reason, when the movement to the axial direction base end side of a moving member is restrict
  • the webbing take-up device is the webbing take-up device according to the second aspect or the third aspect, in which the limiting portion is provided at one end of the cylindrical member.
  • the restricting portion is provided at one end of the cylindrical member, the restricting portion is moved when the movement of the moving member toward the proximal side in the axial direction is restricted by the restricting portion. Can be supported by the cylindrical member.
  • the webbing take-up device is the webbing take-up device according to the fifth aspect, wherein the restricting portion is one end surface of the cylindrical member, and the moving member is one end surface of the cylindrical member.
  • the outer side of the cylindrical member can be deformed radially outward of the cylindrical member.
  • the moving member can be deformed outward in the radial direction of the cylindrical member outside the one end surface of the cylindrical member. For this reason, the moving member deform
  • the moving member in the moving member moved to the distal end side in the axial direction in the event of a vehicle emergency, the moving member moves toward the proximal end side in the axial direction due to the rotation of the spool in the pull-out direction.
  • the movement can be effectively limited.
  • FIG. 6 is a cross-sectional view corresponding to FIG.
  • FIG. 5 shows a state in which the distal end of the moving member in the axial direction is in contact with the movement restricting portion of the second rivet.
  • FIG. 6 shows the state by which the moving member was expanded by the 1st deformation
  • the arrow FR indicates the front side of the vehicle to which the webbing retractor 10 is applied
  • the arrow OUT indicates the vehicle width direction outer side
  • the arrow UP indicates the vehicle upper side.
  • the webbing take-up device 10 includes a frame 12.
  • the frame 12 is fixed to a vehicle lower side portion of a center pillar (not shown) as a vehicle body.
  • the frame 12 includes leg plates 14 and 16, and the leg plate 14 and the leg plate 16 are opposed to each other substantially in the vehicle front-rear direction.
  • the webbing take-up device 10 includes a spool 18.
  • the spool 18 is formed in a substantially cylindrical shape, and is disposed between the leg plate 14 and the leg plate 16 of the frame 12.
  • the center axis direction of the spool 18 is along the opposing direction of the leg plate 14 and the leg plate 16 (that is, substantially the vehicle front-rear direction), and the spool 18 is rotatable around the center axis.
  • the longitudinal end of the elongate webbing 20 is locked to the spool 18, and when the spool 18 is rotated in the winding direction (the direction of arrow A in FIG. 1 and the like), the webbing 20 is moved in the longitudinal direction. It is wound on the spool 18 from the base end side.
  • the front end side of the webbing 20 in the longitudinal direction extends from the spool 18 toward the vehicle upper side, and the front end side of the webbing 20 in the longitudinal direction is formed on a through anchor (not shown) supported on the center pillar on the vehicle upper side of the frame 12. It is turned back to the vehicle lower side through the slit hole.
  • the anchor plate is formed of a metal plate material such as iron, and is fixed to a vehicle floor (not shown) or a skeleton member of a sheet (not shown) corresponding to the webbing take-up device 10.
  • the vehicle seat belt device to which the webbing retractor 10 is applied includes a buckle device (not shown).
  • the buckle device is provided on the inner side in the vehicle width direction of the seat to which the webbing take-up device 10 is applied.
  • the tongue (not shown) provided on the webbing 20 is engaged with the buckle device, so that the webbing 20 is mounted on the body of the occupant. .
  • a shaft portion (not shown) is provided integrally with the spool 18 on the same axis as the spool 18, and this shaft portion is a hole formed in the leg plate 14 of the frame 12. It extends to the vehicle rear side of the frame 12 (not shown).
  • a spring housing 22 is provided on the vehicle rear side of the leg plate 14 of the frame 12.
  • spool urging means such as a mainspring spring is provided inside the spring housing 22 .
  • the spool urging means is directly or indirectly engaged with the spool 18 via the shaft portion, and the spool 18 is urged in the winding direction (direction of arrow A in FIG. 1) by the urging force of the spool urging means. It is energized.
  • the webbing take-up device 10 includes a torsion bar 24 that constitutes a force limiter mechanism.
  • the torsion bar 24 is formed in a bar shape that is substantially long in the vehicle longitudinal direction.
  • a vehicle rear side portion of the torsion bar 24 is disposed inside the spool 18 and is connected to the spool 18 in a state in which relative rotation with respect to the spool 18 is limited.
  • the vehicle front side portion of the torsion bar 24 extends to the outside of the frame 12 (vehicle front side) through a hole formed in the leg plate 16 of the frame 12.
  • Rotating member 28 of pretensioner 26 is provided on the vehicle front side of leg plate 16 of frame 12.
  • the rotating member 28 includes a first rotating unit 30.
  • the first rotating portion 30 of the rotating member 28 is arranged coaxially with the spool 18, and the first rotating portion 30 is connected to the vehicle front side portion of the torsion bar 24. For this reason, the rotation of the rotating member 28 relative to the front portion of the torsion bar 24 is restricted, and thus the rotation of the rotating member 28 is indirectly restricted relative to the spool 18 via the torsion bar 24.
  • the first rotating part 30 of the rotating member 28 includes a first flange 32.
  • the first flange 32 has a disk shape, and a plurality of first engagement teeth 34 as an engagement portion are arranged on the vehicle front side of the first flange 32.
  • the first engagement teeth 34 are formed around the central axis of the first flange 32 at a predetermined interval, and the vehicle rear side end of the first engagement teeth 34 is integrated with the first flange 32. It is connected.
  • the dimension along the rotation circumferential direction of the rotation member 28 in the first engagement teeth 34 is shortened toward the radially outer side of the rotation member 28.
  • a second rotating part 36 that constitutes the rotating member 28 together with the first rotating part 30 is provided on the vehicle front side of the first rotating part 30 of the rotating member 28.
  • the second rotating part 36 includes a second flange 38.
  • the second flange 38 has a disc shape, and a plurality of second engaging teeth 40 as engaging portions are disposed on the vehicle rear side of the second flange 38.
  • These second engagement teeth 40 are formed around the central axis of the second flange 38 at a predetermined interval.
  • the interval between the second engaging teeth 40 adjacent around the central axis of the second rotating portion 36 is the same as the interval between the first engaging teeth 34 adjacent around the central axis of the first rotating portion 30 of the rotating member 28 described above. Has been.
  • each of the second engagement teeth 40 of the second rotating part 36 is seen in the direction of the central axis of the rotating member 28, and the first engagement of the first rotating part 30 adjacent to the periphery of the central axis of the first rotating part 30. It arrange
  • the second rotating unit 36 is connected to the first rotating unit 30, and the second rotating unit 36 is restricted in relative movement with respect to the first rotating unit 30 including relative rotation with respect to the first rotating unit 30. Yes.
  • the lock base 44 includes a pawl pin 46.
  • the axial direction of the pawl pin 46 is the vehicle longitudinal direction, and the vehicle rear side end portion of the pawl pin 46 is supported by the lock base 44 (that is, the rotating member 28).
  • the lock base 44 is provided with a lock pawl 48.
  • the base end portion of the lock pawl 48 is supported by the pawl pin 46 so as to be rotatable around the pawl pin 46.
  • a cover plate 50 as a guide portion constituting both the lock mechanism 42 and the pretensioner 26 is fixed on the vehicle front side of the leg plate 16 of the frame 12.
  • the cover plate 50 is opened to the vehicle rear side, and the bottom plate 52 of the cover plate 50 is opposed to the leg plate 16 in a state of being separated from the leg plate 16 of the frame 12 to the vehicle front side.
  • a ratchet hole 54 is formed in the bottom plate 52 of the cover plate 50, and ratchet teeth are formed in the inner peripheral portion of the ratchet hole 54.
  • the lock pawl 48 of the lock base 44 is opposed to the inner peripheral portion of the ratchet hole 54 of the bottom plate 52 of the cover plate 50 in the rotational radial direction, and when the lock pawl 48 is rotated to one side around the pawl pin 46, The distal end portion of the lock pawl 48 approaches the inner peripheral portion of the ratchet hole 54, and the distal end portion of the lock pawl 48 meshes with the ratchet teeth of the ratchet hole 54.
  • the rotation of the lock base 44 in the pull-out direction is limited, and the rotation of the spool 18 in the pull-out direction is indirectly limited.
  • a sensor holder 56 of the lock mechanism 42 is provided on the vehicle front side of the cover plate 50.
  • the sensor holder 56 is opened to the rear side of the vehicle, and is fixed to the leg plate 16 of the frame 12 directly or indirectly through the cover plate 50.
  • Inside the sensor holder 56 components constituting a sensor mechanism for detecting an emergency state of the vehicle are accommodated.
  • the lock base of the lock mechanism 42 is stored.
  • the lock pawl 48 is rotated to one side around the pawl pin 46 in conjunction with the rotation of the pin 44 in the pull-out direction.
  • the webbing take-up device 10 includes a cylinder 58 as a cylindrical member constituting the pretensioner 26.
  • the cylinder 58 is formed in a cylindrical shape, and the base end portion in the central axis direction of the cylinder 58 is disposed on the vehicle rear upper side of the frame 12.
  • a micro gas generator 60 that constitutes a load generating means is inserted as a fluid pressure generating means at the proximal end in the central axial direction of the cylinder 58.
  • the micro gas generator 60 is electrically connected to a collision detection sensor (both not shown) provided in the vehicle via an ECU as a control unit, and an impact at the time of the vehicle collision is detected by the collision detection sensor. Then, the micro gas generator 60 is operated by the ECU, and the generated gas, which is one mode of the fluid, is supplied to the inside of the cylinder 58.
  • a seal ball 62 as a piston is disposed inside the cylinder 58 of the pretensioner 26.
  • the seal ball 62 is formed of a synthetic resin material, and the shape of the seal ball 62 in a state where no load is applied to the seal ball 62 is a substantially spherical shape.
  • the internal space of the cylinder 58 is partitioned by a seal ball 62 into a base axial direction proximal end side with respect to the seal ball 62 and a central axial direction distal end side with respect to the seal ball 62.
  • a moving member 64 is disposed inside the cylinder 58.
  • the moving member 64 is formed in a cylindrical shape by a synthetic resin material, and can be deformed by receiving an external force.
  • the moving member 64 is disposed on the distal end side in the central axis direction of the cylinder 58 with respect to the seal ball 62, and when the seal ball 62 is moved toward the distal end side in the central axis direction of the cylinder 58, the moving member 64 is moved to the seal ball 62. And is moved toward the front end side of the cylinder 58 in the central axis direction.
  • the cylinder 58 is bent at an intermediate portion in the central axial direction, and the distal end portion in the central axial direction of the cylinder 58 is disposed on the vehicle front upper side of the leg plate 16 of the frame 12. It is sandwiched and held.
  • the front end in the central axis direction of the cylinder 58 is opened to the direction side inclined substantially outward in the vehicle width direction with respect to the lower side of the vehicle, and the moving member 64 that has reached the front end in the central axis direction of the cylinder 58.
  • the moving member 64 protrudes from the front end in the central axis direction of the cylinder 58 to the vehicle lower side.
  • the front end surface in the central axis direction of the cylinder 58 is a plane orthogonal to the central axis direction of the cylinder 58, and the inner end of the cylinder 58 at the front end surface in the central axis direction of the cylinder 58 and the front end portion in the central axis direction of the cylinder 58.
  • the peripheral surface is orthogonal to each other, and the front end surface in the central axis direction of the cylinder 58 and the outer peripheral surface of the cylinder 58 are also orthogonal to each other.
  • a portion on the inner side of the cover plate 50 that is located approximately on the vehicle lower side than the front end in the central axis direction of the cylinder 58 and on the direction side inclined toward the vehicle width direction outer side with respect to the vehicle lower side is defined as a first deformation allowing portion 66. ing. As shown in FIG. 3, in the first deformation permitting portion 66, the space substantially below the vehicle from the front end in the central axis direction of the cylinder 58 is the center of the cylinder 58 from the outer peripheral edge at the front end in the central axis direction of the cylinder 58. It spreads outward in the direction perpendicular to the axis. For this reason, the moving member 64 protruding to the vehicle lower side than the front end in the central axis direction of the cylinder 58 can be deformed so as to expand outward in the axis orthogonal direction of the moving member 64.
  • the front end of the cylinder 58 in the central axis direction is a first restricting portion 68 as a restricting portion.
  • the moving member 64 projecting to the vehicle lower side than the front end in the central axis direction of the cylinder 58 is expanded outward in the direction perpendicular to the axis of the moving member 64 by the first deformation permitting portion 66, the expanded portion of the moving member 64 is The front end of the cylinder 58 faces the first restricting portion 68 in the central axis direction.
  • the above-described rotating member 28 is disposed on the inner side of the cover plate 50 and substantially below the first deformation allowing portion 66.
  • the moving member 64 pressed by the seal ball 62 is moved substantially below the vehicle relative to the first deformation permitting portion 66 of the cover plate 50, the first flange 32 and the first flange 32 of the first rotating portion 30 of the rotating member 28 are connected. 2 between the second rotation portion 36 and the second flange 38, and is brought into contact with the first engagement teeth 34 of the first rotation portion 30 or the second engagement teeth 40 of the second rotation portion 36, and the first engagement teeth 34 or the second engagement tooth 40 is pressed downward by the moving member 64.
  • the rotating member 28 is rotated in the winding direction (the arrow A direction in FIG. 3 and the like), and the moving member 64 is further moved to the lower side of the vehicle by the pressure from the seal ball 62.
  • the moving member 64 is moved downward in the vehicle and the rotating member 28 is rotated in the winding direction, so that the first engaging tooth 34 and the second engaging tooth 40 pierce the moving member 64.
  • the rotating member 28 is further rotated in the winding direction.
  • a guide portion 70 is provided on the lower side of the vehicle than the first deformation allowing portion 66 in the cover plate 50.
  • the guide part 70 is a part of the inner side in the vehicle width direction of the side wall 72 as a wall part of the cover plate 50.
  • the side wall 72 is a cover. It is deformed inside the plate 50 and outward in the vehicle width direction.
  • the inner surface of the side wall 72 in the vehicle lower portion of the guide portion 70 is located on the alternate long and short dash line C that extends downward from the vehicle width direction inner portion of the inner peripheral surface at the front end in the central axis direction of the cylinder 58. Is arranged.
  • the vehicle lower end portion of the guide portion 70 is arranged on a one-dot chain line D extending inward in the vehicle width direction from the rotation center of the rotating member 28 in a direction orthogonal to the central axis direction at the tip portion of the cylinder 58. ing.
  • the vehicle lower side of the guiding portion 70 is a second deformation allowing portion 74.
  • the inner side surface of the side wall 72 of the cover plate 50 is disposed on the inner side in the vehicle width direction than the inner side surface of the guide portion 70.
  • transformation permission part 74 the moving member 64 can expand
  • the vehicle lower side surface of the guiding portion 70 is a second restricting portion 76.
  • the second restricting portion 76 is a plane orthogonal to the central axis direction at the tip of the cylinder 58.
  • a lower portion of the vehicle than the second deformation allowing portion 74 in the side wall 72 of the cover plate 50 is a curved portion 78.
  • the curved portion 78 is curved with the rotation center side of the rotating member 28 as the center of curvature.
  • the curved portion 78 has a larger distance from the rotation center of the rotating member 28 toward the winding direction side.
  • the distance from the rotational center of the rotating member 28 is The radial dimension of the tip circle of the first engaging tooth 34 and the second engaging tooth 40 in the rotating member 28 and the sum of the diameter dimension of the moving member 64 are set to be greater than or equal to.
  • the moving member 64 is bent following the curved portion 78, so that it moves away from the first engaging tooth 34 or the second engaging tooth 40 of the rotating member 28 at the winding direction side end 78 ⁇ / b> A of the curved portion 78. be able to.
  • the angle ⁇ formed by the alternate long and short dash line E passing through the end 78A is set to be less than 180 degrees. In particular, in the present embodiment, the angle ⁇ is set to 90 degrees.
  • a first corner portion 80 as a corner portion is formed on the outer side in the vehicle width direction of the curved portion 78 in the side wall 72 of the cover plate 50, and the curved portion sandwiching the first corner portion 80 in the side wall 72.
  • the side opposite to 78 extends from the first corner portion 80 in a direction inclined inward in the vehicle width direction with respect to the vehicle upper side.
  • a portion of the side wall 72 of the cover plate 50 extending from the first corner portion 80 toward the vehicle upper side is inclined with respect to the alternate long and short dash line E so as to be separated from the alternate long and short dash line E.
  • first corner portion 80 of the side wall 72 of the cover plate 50 is bent with the inside of the cover plate 50 as the center of curvature, and the curvature radius of the first corner portion 80 is the curvature of the side wall 72 of the cover plate 50.
  • the radius of curvature of the portion 78 is made smaller.
  • a second corner portion 82 as a corner portion is formed in the vehicle upper portion of the side wall 72 of the cover plate 50 relative to the first corner portion 80, and the first corner portion sandwiching the second corner portion 82 in the side wall 72.
  • the opposite side of the corner portion 80 extends from the second corner portion 82 inward in the vehicle width direction.
  • the second corner portion 82 is bent with the inside of the cover plate 50 as the center of curvature, and the radius of curvature of the second corner portion 82 is set to be equal to or less than the radius of curvature of the curved portion 78.
  • a portion extending inward in the vehicle width direction from the second corner portion 82 is bent along the cylinder 58 on the side of the cylinder 58.
  • Such a cover plate 50 is fixed to the leg plate 16 of the frame 12 by a plurality of first rivets 84 and one second rivet 86 shown in FIG.
  • a flange portion 88 extends from the side wall 72 of the cover plate 50 to the outside of the cover plate 50, and the first rivet 84 is connected to the flange portion 88 of the cover plate 50 and the leg plate 16 of the frame 12 from the cover plate 50 side.
  • the front end portion (vehicle rear side end portion) of the first rivet 84 is caulked in a state of passing through the first rivet 84.
  • the second rivet 86 is provided on the vehicle upper side of the rotating member 28 on the outer side in the vehicle width direction at the front end in the central axis direction of the cylinder 58.
  • the second rivet 86 is caulked at the tip end portion (vehicle rear side end portion) of the second rivet 86 in a state where it penetrates the bottom plate 52 of the cover plate 50 and the leg plate 16 of the frame 12 from the cover plate 50 side.
  • the intermediate portion of the second rivet 86 is a movement restricting portion 90, and the axial tip of the moving member 64 is brought into contact with the movement restricting portion 90 of the second rivet 86. Movement to the side is restricted.
  • the axial base end of the moving member 64 is the center of the cylinder 58 in the cylinder 58 with the axial tip of the moving member 64 being in contact with the movement restricting portion 90 of the second rivet 86.
  • the axial length of the moving member 64 is set so as not to come off from the tip in the axial direction.
  • the sensor mechanism of the lock mechanism 42 is activated at the time of a vehicle collision, which is an aspect of a vehicle emergency.
  • the lock pawl 48 of the lock base 44 moves to one side around the pawl pin 46 in conjunction with the rotation of the lock mechanism 42 in the pull-out direction (the arrow B direction in FIG. 1 and the like). It is rotated.
  • the front end portion of the lock pawl 48 approaches the inner peripheral portion of the ratchet hole 54 of the bottom plate 52 of the cover plate 50, the front end portion of the lock pawl 48 meshes with the ratchet teeth of the ratchet hole 54, and the lock base 44 is pulled out. Rotation in the direction is limited.
  • the lock base 44 is formed in the second rotating portion 36 of the rotating member 28, and the first rotating portion 30 of the rotating member 28 is restricted in relative rotation with respect to the second rotating portion 36 and the vehicle of the torsion bar 24.
  • the front side is connected. Since both the first rotating portion 30 and the spool 18 are limited in relative rotation with respect to the torsion bar 24, the rotation of the rotating member 28 in the pull-out direction (the direction of arrow B in FIG. 1 and the like) is limited. The rotation of the spool 18 in the drawing direction is limited. This restricts the pulling of the webbing 20 from the spool 18, so that the occupant's body can be restrained by the webbing 20.
  • the spool 18 is rotated in the pull-out direction (the direction of arrow B in FIG. 1 and the like) by the amount of torsional deformation of the torsion bar 24, and the webbing 20 having a length corresponding to the rotation amount in the pull-out direction of the spool 18 is pulled out from the spool 18. Is done.
  • the occupant can move to the front side of the vehicle by the length of the pull-out of the webbing 20 from the spool 18 and a part of the tensile force applied to the webbing 20 from the occupant is subjected to torsional deformation of the torsion bar 24 and absorbed. .
  • the micro gas generator 60 of the pretensioner 26 when operated by the ECU at the time of a vehicle collision, which is one aspect of a vehicle emergency, high-pressure gas is instantaneously supplied to the inside of the cylinder 58. Is done.
  • the seal ball 62 is moved to the front end side in the central axis direction of the cylinder 58 by the pressure of the gas, the moving member 64 is pressed by the seal ball 62 and moved to the front end side in the central axis direction of the cylinder 58.
  • the moving member 64 When the moving member 64 is moved toward the front end in the axial direction, the front end in the axial direction of the moving member 64 is pulled out from the front end in the central axial direction of the cylinder 58 to the vehicle lower side (in the direction of arrow F in FIG. 3 and the like). An inner portion in the vehicle width direction at the tip end portion in the axial direction of the member 64 is brought into contact with the inner surface of the cover plate 50 in the guide portion 70 provided on the side wall 72 of the cover plate 50. In this state, when the moving member 64 is further moved to the axial front end side, the moving member 64 enters between the first flange 32 and the second flange 38 of the rotating member 28 as shown in FIG.
  • first engagement teeth 34 or the second engagement teeth 40 of the rotating member 28 pressed against the distal end in the axial direction of the moving member 64.
  • the first engagement teeth 34 or the second engagement teeth 40 on the drawing direction side (the arrow B direction side in FIG. 4 and the like) are moved by rotation of the rotation member 28 in the winding direction.
  • 64 bites or pierces from the outer peripheral surface of 64 to the radially central side of the moving member 64.
  • the moving member 64 in which the first engaging tooth 34 or the second engaging tooth 40 of the rotating member 28 is bitten or pierced is moved to the vehicle lower side (in the direction of arrow F in FIG. 5 and the like),
  • the rotating member 28 is further rotated in the winding direction (the direction of arrow A in FIG. 5 and the like).
  • the rotation of the rotary member 28 in the winding direction is transmitted to the spool 18 via the torsion bar 24, and the spool 18 is rotated in the winding direction.
  • the webbing 20 is wound around the spool 18 and the restraining force of the occupant by the webbing 20 is increased.
  • first engaging teeth 34 or the second engaging teeth 40 of the rotating member 28 bite or pierce the moving member 64 above the position of the dashed line D in FIG. From this state, when the rotating member 28 is rotated in the winding direction (the direction of arrow A in FIG. 3 and the like) by the movement of the moving member 64 toward the front end in the axial direction, The amount of biting or sticking of the two engaging teeth 40 with respect to the moving member 64 (that is, the engagement range of the first engaging teeth 34 or the second engaging teeth 40 of the rotating member 28 with respect to the moving member 64) is increased.
  • the vehicle lower end of the guide portion 70 of the cover plate 50 is disposed on the vehicle lower side than the one-dot chain line D in FIG.
  • the length from the rotation center of the rotating member 28 to the inner surface of the cover plate 50 in the guide part 70 is the one on the one-dot chain line D in FIG. It becomes longer than the length from the rotation center of the rotation member 28 to the inner surface of the cover plate 50 in the guide portion 70.
  • the moving member 64 is further moved to the front end side in the axial direction in a state where the moving member 64 is in contact with the inner side surface of the cover plate 50 in the guide portion 70 of the cover plate 50, and thereby the moving member 64 is moved.
  • the moving member 64 is separated from the rotation center of the rotating member 28. Therefore, the amount of biting or sticking of the first engaging tooth 34 or the second engaging tooth 40 of the rotating member 28 with respect to the moving member 64 (that is, the first engaging tooth 34 or the first engaging tooth 34 of the rotating member 28 with respect to the moving member 64). (The engagement range of the two engagement teeth 40) becomes smaller (see FIG. 6).
  • the moving member 64 When the moving member 64 is further moved to the front end side in the axial direction from this state, the moving member 64 is bent and deformed with the rotating member 28 side as the center of curvature. In this way, the moving member 64 is moved to the tip end side in the axial direction, so that the tip end in the axial direction of the moving member 64 is brought into contact with the movement restricting portion 90 at the intermediate portion of the second rivet 86. Movement to the tip side is limited.
  • the inner side surface of the side wall 72 of the cover plate 50 is arranged on the inner side in the vehicle width direction than the inner side surface of the side wall 72 of the cover plate 50 in the guide portion 70, Accordingly, the moving member 64 compressed as described above can be deformed in the direction perpendicular to the axis of the moving member 64 so as to fill the space of the second deformation allowing portion 74.
  • the portion of the moving member 64 that has been expanded into the second deformation allowing portion 74 is opposed to the second restricting portion 76 in the central axis direction at the tip of the cylinder 58.
  • the vehicle lower side at the front end in the central axis direction of the cylinder 58 in the cover plate 50 is a first deformation permitting portion 66, so that the moving member 64 compressed as described above is in the direction of the central axis of the cylinder 58. It can expand in the direction perpendicular to the axis on the vehicle lower side at the front end.
  • the portion of the moving member 64 that is expanded in the first deformation allowing portion 66 is opposed to the first restricting portion 68 that is the tip in the central axis direction of the cylinder 58 in the central axis direction of the cylinder 58.
  • the rear portion of the torsion bar 24 is connected to the torsion bar 24 via the spool 18 based on the tensile force applied to the webbing 20 from the body of the passenger.
  • the torsional deformation can be caused in the torsion bar 24 when the applied rotational force in the drawing direction (the direction of arrow B in FIG. 1 and the like) exceeds the mechanical strength of the torsion bar 24.
  • the first restricting portion 68 is the tip of the cylinder 58 in the central axis direction. That is, the first restricting portion 68 is the amount of biting or sticking of the first engaging tooth 34 or the second engaging tooth 40 of the rotating member 28 with respect to the moving member 64, that is, the first amount of the rotating member 28 with respect to the moving member 64.
  • the movable member 64 is disposed closer to the base end side in the axial direction than the position of the dashed line D in FIG. 3 where the engagement range of the engagement teeth 34 or the second engagement teeth 40 is maximized.
  • the moving member 64 In a state where the amount of biting or sticking of the first engaging tooth 34 or the second engaging tooth 40 of the rotating member 28 with respect to the moving member 64 is maximized, the moving member 64 has the first engaging tooth 34 or the second engaging tooth.
  • the rotational force in the pull-out direction (in the direction of arrow B in FIG. 9) received from the tooth 40 is maximized. Since the movement of the moving member 64 toward the axial base end side is limited by the first restricting portion 64 of the cylinder 58 on the axial base end side from such a position, the moving member 64 moves toward the axial base end side. The movement can be effectively limited.
  • the moving member 64 can expand radially in the direction perpendicular to the axis. For this reason, in the first restricting portion 68, the expansion portion of the moving member 64 is brought into contact with the entire region of the front end in the central axis direction of the cylinder 58. Thereby, the movement of the moving member 64 toward the proximal end side in the axial direction can be effectively restricted by the first restricting portion 64 of the cylinder 58.
  • the vehicle lower side surface of the guide portion 70 on the side wall 72 of the cover plate 50 is defined as the second restricting portion 76
  • the vehicle lower side space of the second restricting portion 76 is defined as the second deformation allowing portion 74.
  • the lower end portion of the vehicle of the guide portion 70 is arranged on a one-dot chain line D that is orthogonal to the central axis direction at the front end portion in the central axis direction of the cylinder 58 and passes through the inner side in the vehicle width direction from the rotation center of the rotary member 28.
  • the second restricting portion 76 is a vehicle lower side surface of the guide portion 70 of the cover plate 50, and is formed by deforming the side wall 72 of the cover plate 50 to the inside of the cover plate 50 and to the outside in the vehicle width direction.
  • limiting part 76 namely, guidance
  • a section modulus becomes large compared with the other part of the side wall 72 of the cover plate 50.
  • the mechanical strength of the side wall 72 of the cover plate 50 is higher than that in the other portions, and the expanded portion of the moving member 64 becomes the second restricting portion 76.
  • the movement of the moving member 64 toward the axial base end side can be effectively limited.
  • the first deformation allowance portion 66, the second deformation allowance portion 74, and the second restriction portion 76 are constituted by the cover plate 50. For this reason, even if the 1st deformation
  • the first restricting portion 68 is the tip of the cylinder 58 in the central axis direction. For this reason, even if the 1st restriction part 68 is provided, the number of parts does not increase.
  • the moving member 64 deformed in this way is restored and deformed so as to expand outward in the direction perpendicular to the axis by moving to the vehicle lower side at the tip of the cylinder 58 in the axial direction.
  • the moving member 64 thus restored and deformed is pressed and moved by the first engaging tooth 34 or the second engaging tooth 40 of the rotating member 28 that is about to rotate in the pulling-out direction (the arrow B direction in FIG. 6 and the like).
  • the facing range between the moving member 64 and the first restricting portion 68 is increased. Accordingly, the moving member 64 that is about to move to the axial base end side can be effectively brought into contact with the first restricting portion 68, and the movement of the moving member 64 to the axial base end side is effectively limited. it can.
  • the first restricting portion 68 which is the distal end portion in the central axis direction of the cylinder 58 as a cylindrical member, is arranged at predetermined intervals in the circumferential direction of the cylinder 58. It is recessed toward the axial base end side.
  • the first restricting portion 68 as the restricting portion that is the axial tip portion of the cylinder 58 as the cylindrical member sandwiches the center of the cylinder 58. Two portions are recessed toward the proximal end in the central axial direction of the cylinder 58.
  • the outer diameter of the axial front end portion of the cylinder 58 as a cylindrical member is reduced toward the front end side in the axial direction.
  • the dimension in the direction perpendicular to the axis of the cylinder 58 in the first restricting portion 68 as the restricting portion that is the leading end in the direction is made thinner than the thickness of the cylinder 58, and preferably has a blade shape with a very thin thickness. For this reason, when the portion of the moving member 64 that is expanded outward in the direction perpendicular to the axis contacts the first restricting portion 68 of the cylinder 58, the first restricting portion 68 bites or pierces the expanding portion of the moving member 64. . Thereby, the movement of the moving member 64 toward the axial base end side can be effectively limited.
  • a deforming portion 94 is formed on a side wall 72 as a wall portion of a cover plate 50 as a guide portion.
  • the deforming portion 94 includes an axial tip of a cylinder 58 as a cylindrical member that is a first limiting portion 68 as a limiting portion, and a second limiting portion 76 as a limiting portion provided on the side wall 72 of the cover plate 50.
  • a part of the side wall 72 of the cover plate 50 is deformed outward in the vehicle width direction.
  • the lower end portion of the vehicle of the deforming portion 94 is disposed on the movement locus between the first restricting portion 68 and the second restricting portion 76 when the moving member 64 is moved to the front end side in the axial direction. For this reason, when the moving member 64 is moved to the front end side in the axial direction between the first restricting portion 68 and the second restricting portion 76, the moving member 64 is located on the vehicle lower side of the deformed portion of the side wall 72 of the cover plate 50. It is brought into contact with the end and deformed so as to be recessed outward in the vehicle width direction.
  • the vehicle lower end of the deforming portion 94 is a third restricting portion 96 as a restricting portion.
  • the third restricting portion 96 is disposed on the vehicle upper side with respect to the one-dot chain line D that is orthogonal to the central axis direction at the front end in the central axis direction of the cylinder 58 and passes through the inner side in the vehicle width direction from the rotational center of the rotating member 28.
  • the amount of biting or sticking of the first engaging tooth 34 or the second engaging tooth 40 of the rotating member 28 with respect to the moving member 64 that is, the first engaging tooth 34 or
  • the third engagement tooth 34 is located above the rotational position of the first engagement tooth 34 or the second engagement tooth 40 where the engagement range of the second engagement tooth 40 is maximized, and below the first restriction portion 68.
  • a limiting unit 96 is arranged.
  • the third restricting portion 96 is a plane orthogonal to the central axis direction at the front end in the central axis direction of the cylinder 58, and the moving member 64 deformed by the deforming portion 94 of the side wall 72 of the cover plate 50 is deformed. When restored and deformed on the vehicle lower side of the portion 94, the vehicle lower side portion of the moving member 64 is opposed to the third restricting portion 96 in the central axis direction of the cylinder 58 relative to the deformable portion 94.
  • the moving member 64 when the moving member 64 tries to move to the proximal side in the axial direction, the moving member 64 is brought into contact with the third restricting portion 96 between the first restricting portion 68 and the second restricting portion 76, thereby The movement of the moving member 64 toward the base end side in the axial direction can be more effectively limited.
  • the first engagement tooth 34 or the second engagement tooth 40 of the rotating member 28 has a maximum amount of biting or sticking into the moving member 64.
  • a third restricting portion 96 is disposed above the rotational position of the engaging teeth 34 or the second engaging teeth 40 and below the vehicle relative to the first restricting portion 68.
  • the third restricting portion 96 is a vehicle lower end portion of the deformable portion 94 formed on the side wall 72 of the cover plate 50, and an axial front end of the cylinder 58 as a cylindrical member that is the first restricting portion 68.
  • the moving member 64 is disposed outside the movement locus toward the distal end side in the axial direction between the second restricting portion 76 and the second restricting portion 76.
  • the vehicle lower side portion of the third restricting portion 96 inside the cover plate 50 is a third deformation allowing portion 98
  • the moving member 64 compressed in the axial direction is a space of the third deformation allowing portion 98.
  • the movable member 64 can be deformed in the direction perpendicular to the axis so as to fill the gap.
  • the moving member 64 compressed by being pressed by the first engaging teeth 34 or the second engaging teeth 40 of the rotating member 28 that is about to rotate in the pull-out direction (the direction of arrow B in FIG. 14). Can be deformed in the direction perpendicular to the axis of the moving member 64 so as to fill the space of the third deformation allowing portion 98. In this way, the portion of the moving member 64 that has been expanded into the third deformation allowing portion 98 is opposed to the third restricting portion 96 in the central axis direction at the front end portion of the cylinder 58 in the central axis direction.
  • the moving member 64 since the deforming portion 94 is provided outside the movement locus of the moving member 64, the moving member 64 resists from the deforming portion 94 when the moving member 64 is moved to the distal end side in the axial direction. Can be suppressed. As a result, the moving member 64 can smoothly move toward the distal end in the axial direction.
  • the second restricting portion 76 as the restricting portion formed on the side wall 72 of the cover plate 50 extends in the central axis direction at the distal end portion in the central axial direction of the cylinder 58. It is arranged on the upper side of the vehicle with respect to an alternate long and short dash line D that is orthogonal to the rotation center 28 and passes through the inner side in the vehicle width direction.
  • the first engagement tooth 34 or the second engagement that maximizes the amount of biting or sticking of the first engagement tooth 34 or the second engagement tooth 40 of the rotating member 28 with respect to the moving member 64.
  • a second restricting portion 76 is disposed on the vehicle upper side with respect to the rotational position of the teeth 40 and on the vehicle lower side with respect to the first restricting portion 68 serving as a restricting portion that is the front end in the central axis direction of the cylinder 58. Even if it is such a structure, the effect similar to the said 1st Embodiment can be acquired.
  • the first deformation allowing part 66 and the first restriction part 68, and the second deformation allowing part 74 and the second restriction part 76 are provided.
  • the configuration may include only the first deformation allowance portion 66 and the first restriction portion 68, or may include only the second deformation allowance portion 74 and the second restriction portion 76.
  • the 1st restriction part 68 as a restriction part is made into the central-axis direction front-end
  • the 2nd restriction part as a restriction part Reference numeral 76 denotes a configuration provided on the cover plate 50 as a guide portion.
  • the limiting portion may be provided on the leg plate 16 or the like of the frame 12, or may be provided separately from the cylindrical member or the guide portion.
  • the first deformation allowing portion 66 and the second deformation allowing portion 74 as the deformation allowing portion are provided on the cover plate 50 as the guide portion.
  • a configuration in which the front end in the central axis direction of the cylinder 58 is disposed outside the cover plate 50 and the movable member 64 can be expanded in the direction perpendicular to the axis between the front end in the central axis direction of the cylinder 58 and the cover plate 50.
  • the axially extending direction of the moving member 64 is obtained by abutting the expansion portion of the moving member 64 in the direction perpendicular to the axis between the front end in the central axis direction of the cylinder 58 and the cover plate 50 on the front end in the central axis direction of the cylinder 58.
  • the structure to which the movement to the base end side is restricted may be sufficient.
  • the second restriction portion 76 as the restriction portion and the second deformation permission portion 74 as the deformation permission portion are the first engagement teeth 34 or the second engagement teeth 40 of the rotating member 28.
  • the amount of biting or piercing with respect to the moving member 64 is set in the vicinity of the position where the amount is maximum.
  • the installation position of the limiting part and the installation position of the deformation-permitting part are positions where the amount of biting or piercing to the moving member 64 of the first engaging tooth 34 or the second engaging tooth 40 of the rotating member 28 is maximized. It may be set to a part other than the vicinity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

Dans un dispositif enrouleur de ceinture de sécurité (10), lorsqu'un élément de rotation (28) est tourné dans une direction d'enroulement alors que des premières dents d'entrée en prise (34) ou des secondes dents d'entrée en prise (40) de l'élément de rotation (28) sont perçantes ou coupantes dans un élément de mouvement (64), l'élément de mouvement (64) est pressé par les premières dents d'entrée en prise (34) ou les secondes dents d'entrée en prise (40) de l'élément de rotation (28). L'élément de mouvement (64) s'étend ainsi à l'intérieur d'une première partie permettant une déformation (66) et d'une seconde partie permettant une déformation (74) à l'intérieur d'une plaque de recouvrement (50), et ladite section élargie de l'élément de mouvement (64) fait face à une première partie de limitation (68), qui est la surface d'extrémité de pointe d'un cylindre (58) dans la direction d'axe central de ce dernier, et une seconde partie de limitation (76) de la plaque de recouvrement (50).
PCT/JP2017/021183 2016-06-09 2017-06-07 Dispositif enrouleur de ceinture de sécurité WO2017213187A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2018521761A JP6827043B2 (ja) 2016-06-09 2017-06-07 ウェビング巻取装置
US16/305,615 US10919488B2 (en) 2016-06-09 2017-06-07 Webbing take-up device
CN201780034316.4A CN109311448B (zh) 2016-06-09 2017-06-07 安全带卷取装置
DE112017002911.2T DE112017002911T5 (de) 2016-06-09 2017-06-07 Gurtbandaufwickelvorrichtung

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Application Number Priority Date Filing Date Title
JP2016-115674 2016-06-09
JP2016115674 2016-06-09

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WO2017213187A1 true WO2017213187A1 (fr) 2017-12-14

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JP (1) JP6827043B2 (fr)
CN (1) CN109311448B (fr)
DE (1) DE112017002911T5 (fr)
WO (1) WO2017213187A1 (fr)

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WO2023112614A1 (fr) * 2021-12-17 2023-06-22 株式会社東海理化電機製作所 Dispositif d'enroulement de sangle

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US11325561B2 (en) * 2017-08-03 2022-05-10 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Webbing retractor
US11220236B2 (en) * 2018-03-30 2022-01-11 Joyson Safety Systems Acquisition Llc Seat belt retractor
JP7206567B2 (ja) * 2019-11-01 2023-01-18 株式会社東海理化電機製作所 ウェビング巻取装置
JP2021178567A (ja) * 2020-05-13 2021-11-18 株式会社東海理化電機製作所 ウェビング巻取装置
JP2022133159A (ja) * 2021-03-01 2022-09-13 株式会社東海理化電機製作所 ウェビング巻取装置

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US20200282948A1 (en) 2020-09-10
US10919488B2 (en) 2021-02-16
DE112017002911T5 (de) 2019-03-07
CN109311448B (zh) 2021-04-23
JP6827043B2 (ja) 2021-02-10
CN109311448A (zh) 2019-02-05
JPWO2017213187A1 (ja) 2019-03-28

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